I’ve needed to detect a frequency of an audio signal a couple of times in my life, but I cannot for the love of me remember what does the FFT output actually mean. So I took this knowledge out of my latest project and packed it up in this crate.
Also this is my first potentially useful published crate, so if I missed anything, please let me know!
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/// # Panics
///
/// - if `samples.len()` does not match the `sample_count` passed to [Self::new]
/// - if there are `NaN`s in the sample slice
Since this is library code, why not make the function return a Result?
0 points
The new version seems to fix that since your comment was written, but it will stil panics if less than 2 samples are provided, unless the crate it wraps panics at an earlier point.
let peak = buf
.iter()
.copied()
.enumerate()
.take(self.sample_count / 2)
.max_by_key(|(_, s)| (s.abs() * 1000.0) as u32)
.expect("to have at least 1 sample");
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